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Optical Emission from Aspherical Supernovae and the Hypernova SN 1998bw
K. Maeda, P. A. Mazzali, K. Nomoto
A fully 3D Monte Carlo scheme is applied to compute optical bolometric light curves for aspherical (jet-like) supernova explosion models. Density and abundance distributions are ta…
The peculiar type Ib supernova 2005bf: explosion of a massive He star with a thin hydrogen envelope?
G. C. Anupama, D. K. Sahu, J. Deng +5
We present BVRI photometry and optical spectroscopy of SN 2005bf near light maximum. The maximum phase is broad and occurred around 2005 May 7, about forty days after the shock bre…
Off-Axis Properties of Short Gamma-Ray Bursts
H. -Th. Janka, M. -A. Aloy, P. A. Mazzali +1
Based on recent models of relativistic jet formation by thermal energy deposition around black hole-torus systems, the relation between the on- and off-axis appearance of short, ha…
Nebular Spectra of SN 1998bw Revisited: Detailed Study by One and Two Dimensional Models
K. Maeda, K. Nomoto, P. A. Mazzali +1
Refined one- and two-dimensional models for the nebular spectra of the hyper-energetic Type Ic supernova (SN) 1998bw, associated with the gamma-ray burst GRB980425, from 125 to 376…
A Gamma-Ray Burst Mission to Investigate the Properties of Dark Energy
D. Q. Lamb, G. R. Ricker, D. Lazzati +26
[Abridged] Very recently, relations between the peak energy of Gamma-Ray Burst burst spectra, the isotropic-equivalent energy of the burst, and the radiated energy of the burst hav…
An Asymmetric, Energetic Type Ic Supernova Viewed Off-Axis, and a Link to Gamma-Ray Bursts
P. A. Mazzali, K. S. Kawabata, K. Maeda +13
Type Ic supernovae, the explosions following the core collapse of massive stars that have previously lost their hydrogen and helium envelopes, are particularly interesting because…
Spectroscopy of the type Ia supernova SN 2002er: days -11 to +215
Rubina Kotak, Peter Meikle, Giuliano Pignata +8
We present an extensive set of optical spectroscopy of the nearby type Ia supernova, SN 2002er, with 24 epochs spanning -11 to +34 days. Its spectral evolution is fairly typical of…
High-Velocity Features: a ubiquitous property of Type Ia SNe
P. A. Mazzali, S. Benetti, G. Altavilla +26
Evidence of high-velocity features such as those seen in the near-maximum spectra of some Type Ia Supernovae (eg SN 2000cx) has been searched for in the available SNIa spectra obse…
On the Light Curve and Spectrum of SN 2003dh Separated from the Optical Afterglow of GRB 030329
J. Deng, N. Tominaga, P. A. Mazzali +2
The net optical light curves and spectra of the supernova (SN) 2003dh are obtained from the published spectra of GRB 030329, covering about 6 days before SN maximum to about 60 day…